tree 044e6e2409872d7ee17c71546fcfdceb4bb6ae22
parent 278dac914d8c3990fc56b39dccab059b1b805d92
author Craig Mautner <cmautner@google.com> 1360965776 -0800
committer Craig Mautner <cmautner@google.com> 1361326293 -0800

Begin switch over to task based history.

- Introduce the task history and add to and remove from it with
verification.

Change-Id: If97e74f5a13f85acdb1521fc6d0b066a7e8584ae